Use postgres alpine images

Author: miharekar

.github/workflows/build-and-push-images.yml

@@ -11,11 +11,12 @@ jobs:
     strategy:
       matrix:
         include:
-          - { postgres: 12, alpine: '3.12' }
-          - { postgres: 13, alpine: '3.14' }
-          - { postgres: 14, alpine: '3.16' }
-          - { postgres: 15, alpine: '3.17' }
-          - { postgres: 16, alpine: '3.19' }
+          - { postgres: 12 }
+          - { postgres: 13 }
+          - { postgres: 14 }
+          - { postgres: 15 }
+          - { postgres: 16 }
+          - { postgres: 17 }
 
     steps:
       - name: Checkout repository
@@ -40,7 +41,7 @@ jobs:
           push: true
           tags: ${{ github.repository }}:${{ matrix.postgres }}
           build-args: |
-            ALPINE_VERSION=${{ matrix.alpine }}
+            POSTGRES_VERSION=${{ matrix.postgres }}
           platforms: |
             linux/amd64
             linux/arm64

Dockerfile

@@ -1,5 +1,5 @@
-ARG ALPINE_VERSION
-FROM alpine:${ALPINE_VERSION}
+ARG POSTGRES_VERSION
+FROM postgres:${POSTGRES_VERSION}-alpine
 ARG TARGETARCH
 
 ADD src/install.sh install.sh

README.md

@@ -54,9 +54,9 @@ docker exec <container name> sh restore.sh <timestamp>
 
 # Development
 ## Build the image locally
-`ALPINE_VERSION` determines Postgres version compatibility. See [`build-and-push-images.yml`](.github/workflows/build-and-push-images.yml) for the latest mapping.
+`POSTGRES_VERSION` determines Postgres version.
 ```sh
-DOCKER_BUILDKIT=1 docker build --build-arg ALPINE_VERSION=3.14 .
+DOCKER_BUILDKIT=1 docker build --build-arg POSTGRES_VERSION=17 .
 ```
 ## Run a simple test environment with Docker Compose
 ```sh

docker-compose.yaml

@@ -12,11 +12,11 @@ services:
     build:
       context: .
       args:
-        ALPINE_VERSION: '3.16'
+        POSTGRES_VERSION: '17'
     environment:
-      SCHEDULE: '@weekly'     # optional
-      BACKUP_KEEP_DAYS: 7     # optional
-      PASSPHRASE: passphrase  # optional
+      SCHEDULE: '@weekly' # optional
+      BACKUP_KEEP_DAYS: 7 # optional
+      PASSPHRASE: passphrase # optional
       S3_REGION:
       S3_ACCESS_KEY_ID:
       S3_SECRET_ACCESS_KEY: