docs: Manual Update and docker-compose cleanup (#61)

* Added command to trigger a manual report update. Removes verison-tag from docker-compose, since its deprecated

* chore: Added docker-compose examples and env-file

- Added examples-folder
- Added an example for a docker-compose with mysql
- Added an example for a docker-compose with postgres
- Extracted the most important variables to an env.example file
- Added some documentation on how to use the env-file and the compose files

examples/docker-compose.postgres.yml

@@ -0,0 +1,37 @@
+services:
+  dmarc-report:
+    image: "gutmensch/dmarc-report:latest"
+    hostname: dmarc-report
+    container_name: dmarc-report
+    depends_on:
+      db:
+        condition: service_healthy
+    ports:
+      - "80:80"
+    environment:
+      - "REPORT_DB_TYPE=pgsql"
+      - "REPORT_DB_PORT=5432"
+      - "REPORT_DB_NAME=dmarc_report"
+      - "REPORT_DB_USER=dmarc_report"
+      - "REPORT_DB_PASS=${DMARC_DB_PASSWORD}"
+      - "PARSER_IMAP_SERVER=${IMAP_SERVER}"
+      - "PARSER_IMAP_PORT=${IMAP_PORT:-993}"
+      - "PARSER_IMAP_USER=${DMARC_EMAIL}"
+      - "PARSER_IMAP_PASS=${DMARC_PASSWORD}"
+      - "PARSER_IMAP_READ_FOLDER=Inbox"
+      - "PARSER_IMAP_MOVE_FOLDER=${IMAP_MOVE_FOLDER:-processed}"
+      - "PARSER_IMAP_MOVE_FOLDER_ERR=${IMAP_MOVE_FOLDER_ERR:-error}"
+
+  db:
+    image: postgres:latest
+    environment:
+      - "POSTGRES_DB=dmarc_report"
+      - "POSTGRES_USER=dmarc_report"
+      - "POSTGRES_PASSWORD=${DMARC_DB_PASSWORD}"
+    volumes:
+      - ./run/db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U dmarc_report"]
+      interval: 10s
+      timeout: 10s
+      retries: 5