Use environment file, but allow it to be changed via an environment variable

app/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.16
+FROM docker.io/alpine:3.16
 EXPOSE 9000/tcp
 
 ENV SCRIPT_ROOT=/opt/tt-rss

docker-compose.yml

@@ -1,13 +1,16 @@
+---
 version: '3'
 
 services:
   db:
-    image: postgres:12-alpine
+    image: docker.io/postgres:12-alpine
     restart: unless-stopped
     environment:
       - POSTGRES_USER=${TTRSS_DB_USER}
       - POSTGRES_PASSWORD=${TTRSS_DB_PASS}
       - POSTGRES_DB=${TTRSS_DB_NAME}
+    env_file:
+      - ${ENV_FILE:-.env}
     volumes:
       - db:/var/lib/postgresql/data
 
@@ -17,7 +20,7 @@ services:
         ./app
     restart: unless-stopped
     env_file:
-      - .env
+      - ${ENV_FILE:-.env}
     volumes:
       - app:/var/www/html
       - ./config.d:/opt/tt-rss/config.d:ro
@@ -30,7 +33,7 @@ services:
         ./app
     restart: unless-stopped
     env_file:
-      - .env
+      - ${ENV_FILE:-.env}
     volumes:
       - backups:/backups
       - app:/var/www/html
@@ -44,7 +47,7 @@ services:
         ./app
     restart: unless-stopped
     env_file:
-      - .env
+      - ${ENV_FILE:-.env}
     volumes:
       - app:/var/www/html
       - ./config.d:/opt/tt-rss/config.d:ro
@@ -57,6 +60,8 @@ services:
     restart: unless-stopped
     ports:
       - ${HTTP_PORT}:80
+    env_file:
+      - ${ENV_FILE:-.env}
     volumes:
       - app:/var/www/html:ro
     depends_on:

web-nginx/Dockerfile

@@ -1,4 +1,4 @@
-FROM nginx:alpine
+FROM docker.io/nginx:alpine
 
 HEALTHCHECK CMD curl --fail http://localhost/tt-rss/index.php || exit 1