Update Docker Compose configuration file (#1244)

According to the official documentation, Docker Compose files are now
supposed to be named `compose.yml`:
https://docs.docker.com/compose/intro/compose-application-model/

The `version:` line has been deprecated:
https://docs.docker.com/reference/compose-file/version-and-name/#version-top-level-element-obsolete

compose.yml

@@ -0,0 +1,46 @@
+services:
+
+  nitter:
+    image: zedeus/nitter:latest
+    container_name: nitter
+    ports:
+      - "127.0.0.1:8080:8080" # Replace with "8080:8080" if you don't use a reverse proxy
+    volumes:
+      - ./nitter.conf:/src/nitter.conf:Z,ro
+      - ./sessions.jsonl:/src/sessions.jsonl:Z,ro # Run get_sessions.py to get the credentials
+    depends_on:
+      - nitter-redis
+    restart: unless-stopped
+    healthcheck:
+      test: wget -nv --tries=1 --spider http://127.0.0.1:8080/Jack/status/20 || exit 1
+      interval: 30s
+      timeout: 5s
+      retries: 2
+    user: "998:998"
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+
+  nitter-redis:
+    image: redis:6-alpine
+    container_name: nitter-redis
+    command: redis-server --save 60 1 --loglevel warning
+    volumes:
+      - nitter-redis:/data
+    restart: unless-stopped
+    healthcheck:
+      test: redis-cli ping
+      interval: 30s
+      timeout: 5s
+      retries: 2
+    user: "999:1000"
+    read_only: true
+    security_opt:
+      - no-new-privileges:true
+    cap_drop:
+      - ALL
+
+volumes:
+  nitter-redis: