Setup/Add PostgreSQL/pgAdmin Docker Compose

README.md

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 # Directories of docker-compose-files
 Putting these docker-compose-files makes it tirivial to share (easy configuring alternative to existing services) with the world.
 
+## Docker Setups
+List of Docker Compose setups.
+
+- [`PostgreSQL / pgAdmin`](https://github.com/bhavik2936/docker-compose-files/blob/main/postgres-pgadmin) - Basic setup of PostgreSQL database with pgAdmin.
+
 ## Feedback
 Suggestions/improvements are [welcomed](https://github.com/bhavik2936/docker-compose-files/issues)!

postgres-pgadmin/README.md

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+# Postgres-pgAdmin Docker Compose
+It contains docker instances for both **PostgreSQL** & **pgAdmin** internally connected via bridge network.
+
+### PostgreSQL
+Postgres, the database server itself can be accessed on host machine (localhost) on port _5432_.
+
+#### Description
+Below configuration are already set by default via `pgCreds.env` file and can be modified by overriding the same.
+
+| Config   | Value | Comment                          |
+| -------- | ----- | -------------------------------- |
+| Port     | 5432  | Exposed at localhost (127.0.0.1) |
+| Username | root  |                                  |
+| Password | root  |                                  |
+
+### pgAdmin
+pgAdmin is integrated to graphically visualize the postgres database.
+It can be accessed on host machine (localhost) web browser at http://localhost:8088.
+
+#### Configuration
+Below configuration are already set by default via `pgAdminCreds.env` file and can be modified by overriding the same.
+
+| Config   | Value              | Comment                                                           |
+| -------- | ------------------ | ----------------------------------------------------------------- |
+| Port     | 8088               | Exposed at localhost (127.0.0.1)                                  |
+| Username | admin@postgres.com |                                                                   |
+| Password | pgadmin            |                                                                   |
+| Host     | postgres           | To connect docker instance server of postgres database in pgAdmin |

postgres-pgadmin/docker-compose.yml

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+# Version of docker-compose file is no longer required
+version: '3.3'
+
+services:
+
+  postgres:
+    image: postgres
+    container_name: postgres
+    restart: unless-stopped
+    ports:
+      - 5432:5432
+    env_file:
+      - pgCreds.env
+    networks:
+      - pg-network
+    volumes:
+      - pg-data:/var/lib/postgresql/data
+
+  pgadmin:
+    image: dpage/pgadmin4
+    container_name: pgadmin
+    depends_on:
+      - postgres
+    restart: unless-stopped
+    env_file:
+      - pgAdminCreds.env
+    ports:
+      - 8088:80
+    networks:
+      - pg-network
+    volumes:
+      - pgadmin-data:/var/lib/pgadmin
+
+# Bridge type of network connecting to both (postgres, pgadmin) containers.
+# As recommended by docker (https://docs.docker.com/network/bridge)
+networks:
+  pg-network:
+    name: pg-network
+    driver: bridge
+
+# Named volumes for persisting necessary containers' data across restart.
+volumes:
+  pg-data:
+  pgadmin-data:

postgres-pgadmin/pgAdminCreds.env

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+PGADMIN_DEFAULT_EMAIL=admin@postgres.com
+PGADMIN_DEFAULT_PASSWORD=pgadmin

postgres-pgadmin/pgCreds.env

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+POSTGRES_USER=root
+POSTGRES_PASSWORD=root