adding docker-compose related files/configs

configurations/pleroma-db/postgresql.conf

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+listen_addresses = '127.0.0.1'

docker-compose.yml

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+version: '3.1'
+
+services:
+  pleroma:
+    image: git.pleroma.social:5050/pleroma/pleroma:latest
+    container_name: "pleroma"
+    hostname: "pleroma"
+    labels:
+      - "org.label-schema.group=pleroma"
+    restart: always
+    env_file: ./environments/pleroma/pleroma.env
+    depends_on:
+      - pleroma-db
+    ports:
+      - "127.0.0.1:4000:4000"
+    volumes:
+      - ./volumes/pleroma/config.exs:/var/lib/pleroma/config.exs
+      - ./volumes/pleroma/uploads:/var/lib/pleroma/uploads
+
+  pleroma-db:
+    image: postgres:12.1-alpine
+    container_name: "pleroma-db"
+    hostname: "pleroma-db"
+    labels:
+      - "com.centurylinklabs.watchtower.enable=False"
+      - "org.label-schema.group=pleroma"
+    restart: always
+    env_file: ./environments/pleroma-db/postgres.env
+    ports:
+      - "127.0.0.1:5432:5432"
+    volumes:
+      - ./volumes/pleroma-db/pgdata:/var/lib/postgresql/data
+      - ./volumes/pleroma-db/pginit:/docker-entrypoint-initdb.d
+

environments/pleroma-db/postgres.env

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+POSTGRES_PASSWORD=pleroma
+POSTGRES_USER=pleroma

environments/pleroma/pleroma.env

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+DB_USER=pleroma
+DB_PASS=pleroma
+DB_HOST=pleroma-db
+DB_NAME=pleroma
+INSTANCE_NAME=Pleroma
+ADMIN_EMAIL=admin@ops.pleroma.social
+NOTIFY_EMAIL=pleroma+admin@ops.pleroma.social
+DOMAIN=ops.pleroma.social
+PORT=4000