feat: add reverse proxy

Author: PascalinDe

Dockerfiles/Dockerfile.backend

@@ -1,7 +1,12 @@
 FROM node:20-bookworm
 
+# install Nginx
+RUN apt-get update && apt-get install nginx -y
+COPY ../Dockerfiles/nginx/default /etc/nginx/sites-available/default
+
+# install backend
 WORKDIR /web/backend
 COPY ../web/backend .
 RUN npm install
-ENTRYPOINT ["npm", "start"]
+ENTRYPOINT ["/bin/bash", "-c", "/usr/sbin/nginx && npm start"]
 

Dockerfiles/nginx/default

@@ -0,0 +1,6 @@
+server {
+    listen 80;
+    location / {
+        proxy_pass http://dela-leader:8080;
+    }
+}

README.docker.md

@@ -11,7 +11,7 @@ The relevant files are:
 You need to create a local .env file with the following content:
 
 ```
-DELA_NODE_URL=http://dela-leader:8080           # Dela node URL *within the Docker network* (port must be in DELA_PROXY_PORT_RANGE)
+DELA_NODE_URL=http://127.0.0.1:80               # reverse proxy within backend container
 DATABASE_USERNAME=dvoting                       # choose any PostgreSQL username
 DATABASE_PASSWORD=                              # choose any PostgreSQL password
 DATABASE_HOST=db                                # PostgreSQL host *within the Docker network*