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Update Dockerfile
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‎Dockerfile‎

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FROM nginx:alpine
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RUN apk add --no-cache curl
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RUN rm /etc/nginx/conf.d/default.conf
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# =====================================================================================
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# STAGE 1: The "Builder"
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# This stage uses Node.js to download the source files and build the static site.
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# =====================================================================================
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FROM node:18-alpine AS builder
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COPY <<EOF /etc/nginx/conf.d/gitbook-proxy.conf
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upstream gitbook {
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server nebulaclient.gitbook.io:443;
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}
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# Install git, which is required by some tools.
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RUN apk add --no-cache git
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server {
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listen 3587;
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server_name _;
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# Install the necessary command-line tools globally.
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# gitbook-exporter: Downloads the Markdown source from a live GitBook site.
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# gitbook-cli: The official tool to build a static site from Markdown source.
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RUN npm install -g gitbook-exporter gitbook-cli
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resolver 8.8.8.8 valid=300s;
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resolver_timeout 5s;
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# Set a working directory inside the container.
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WORKDIR /app
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location = /robots.txt {
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rewrite ^ /nebula/robots.txt last;
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}
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# Run the exporter to download the source files from the live GitBook site.
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# This creates a directory named after the book, e.g., "nebula".
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RUN gitbook-exporter https://nebulaclient.gitbook.io/nebula/
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location ~ /(sitemap\.xml|robots\.txt)$ {
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proxy_pass https://nebulaclient.gitbook.io;
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proxy_ssl_server_name on;
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proxy_ssl_verify off;
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# Navigate into the newly created source directory.
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# The directory name is based on the book's title, so we use a wildcard.
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WORKDIR /app/nebula
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proxy_set_header Accept-Encoding "";
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# Install the required plugins for the book (defined in its book.json).
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RUN gitbook install
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proxy_set_header Host nebulaclient.gitbook.io;
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proxy_set_header X-Real-IP \$remote_addr;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto https;
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# Build the final, static HTML site.
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# This creates a "_book" directory containing all the files.
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RUN gitbook build
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sub_filter_once off;
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sub_filter_types text/xml application/xml text/plain;
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sub_filter 'https://nebulaclient.gitbook.io' 'https://\$host';
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}
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# =====================================================================================
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# STAGE 2: The "Runner"
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# This stage uses a minimal NGINX server to host the static files.
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# =====================================================================================
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FROM nginx:1.25-alpine
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location ~* \.(json|js|txt|xml)$ {
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proxy_pass https://nebulaclient.gitbook.io;
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proxy_ssl_server_name on;
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proxy_ssl_verify off;
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proxy_set_header Host nebulaclient.gitbook.io;
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proxy_set_header X-Real-IP \$remote_addr;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto https;
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proxy_set_header X-Forwarded-Host \$host;
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proxy_set_header User-Agent \$http_user_agent;
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sub_filter_once off;
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sub_filter_types application/xml application/json application/javascript text/javascript text/plain;
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sub_filter 'https://nebulaclient.gitbook.io' 'https://\$host';
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sub_filter 'http://nebulaclient.gitbook.io' 'https://\$host';
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sub_filter 'nebulaclient.gitbook.io' '\$host';
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sub_filter '"//nebulaclient.gitbook.io' '"//\$host';
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sub_filter "'//nebulaclient.gitbook.io" "'//\$host";
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sub_filter "https:\\/\\/nebulaclient.gitbook.io" "https:\\/\\/\$host";
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sub_filter "nebulaclient\\.gitbook\\.io" "\$host";
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}
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# Set the port you want to expose.
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ARG PORT=3587
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EXPOSE ${PORT}
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location / {
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proxy_pass https://nebulaclient.gitbook.io;
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proxy_ssl_server_name on;
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proxy_ssl_verify off;
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proxy_set_header Host nebulaclient.gitbook.io;
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proxy_set_header X-Real-IP \$remote_addr;
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proxy_set_header X-Forwarded-For \$proxy_add_x_forwarded_for;
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proxy_set_header X-Forwarded-Proto https;
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proxy_set_header X-Forwarded-Host \$host;
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proxy_set_header X-Forwarded-Port \$server_port;
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proxy_set_header User-Agent \$http_user_agent;
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proxy_redirect https://nebulaclient.gitbook.io/ https://\$host/;
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proxy_redirect https://nebulaclient.gitbook.io https://\$host;
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proxy_redirect http://nebulaclient.gitbook.io/ https://\$host/;
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proxy_redirect http://nebulaclient.gitbook.io https://\$host;
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proxy_redirect ~^https?://nebulaclient\.gitbook\.io(.*)\$ https://\$host\$1;
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proxy_connect_timeout 30s;
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proxy_send_timeout 30s;
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proxy_read_timeout 30s;
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proxy_http_version 1.1;
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proxy_set_header Connection "";
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sub_filter_once off;
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sub_filter_types application/xml text/plain text/html text/css text/javascript application/javascript application/json text/xml application/xml;
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sub_filter 'https://nebulaclient.gitbook.io' 'https://\$host';
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sub_filter 'http://nebulaclient.gitbook.io' 'https://\$host';
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sub_filter 'nebulaclient.gitbook.io' '\$host';
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sub_filter '"//nebulaclient.gitbook.io' '"//\$host';
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sub_filter "'//nebulaclient.gitbook.io" "'//\$host";
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sub_filter "https:\\/\\/nebulaclient.gitbook.io" "https:\\/\\/\$host";
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sub_filter "http:\\/\\/nebulaclient.gitbook.io" "https:\\/\\/\$host";
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sub_filter "nebulaclient\\.gitbook\\.io" "\$host";
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proxy_intercept_errors on;
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error_page 301 302 307 = @handle_redirect;
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}
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# Remove the default NGINX configuration file.
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RUN rm /etc/nginx/conf.d/default.conf
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# Copy the static HTML files generated in the "builder" stage
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# into the default NGINX web root directory.
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COPY --from=builder /app/nebula/_book /usr/share/nginx/html
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# Copy our custom NGINX configuration.
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# This config tells NGINX to listen on our chosen port and serve the static files.
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COPY <<EOF /etc/nginx/conf.d/gitbook.conf
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server {
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listen ${PORT};
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server_name _;
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location @handle_redirect {
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set \$redirect_location \$upstream_http_location;
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set \$redirect_host '';
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if (\$redirect_location ~ "^https?://nebulaclient\.gitbook\.io(.*)") {
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set \$redirect_path \$1;
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return 302 https://\$host\$redirect_path;
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}
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return 302 https://\$host/;
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# The root directory where our static files are located.
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root /usr/share/nginx/html;
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index index.html index.htm;
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# Standard configuration for serving static files.
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# It tries to find a file matching the URI, then a directory,
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# and finally falls back to the index.html for clean URLs.
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location / {
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try_files \$uri \$uri/ /index.html;
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}
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access_log /var/log/nginx/access.log;
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error_log /var/log/nginx/error.log;
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# Optional: Add headers for security and caching.
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add_header X-Frame-Options "SAMEORIGIN";
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add_header X-Content-Type-Options "nosniff";
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add_header X-XSS-Protection "1; mode=block";
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}
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EOF
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EXPOSE 3587
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# Command to run NGINX in the foreground.
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CMD ["nginx", "-g", "daemon off;"]

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