chore: supply pre-build docker image (#199)

* feat: supply pre-built docker image

* chore: add docker run to docs

.github/workflows/docker.yaml

@@ -0,0 +1,58 @@
+name: Build docker image
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - 'v*'
+
+permissions:
+  packages: write
+
+jobs:
+  build:
+    name: build and publish atuin image
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Check Out Repo
+        uses: actions/checkout@v2
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: ghcr.io/${{ github.repository_owner }}/atuin
+          tags: |
+            type=ref,event=pr
+            type=ref,event=branch
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          context: ./
+          file: ./Dockerfile
+          builder: ${{ steps.buildx.outputs.name }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}

docs/server.md

@@ -66,3 +66,11 @@ Defaults to `false`.
 ### db_uri
 
 A valid postgres URI, where the user and history data will be saved to.
+
+## Docker
+
+There is a supplied docker image to make deploying a server as a container easier.
+
+```sh
+docker run -d -v "$USER/.config/atuin:/config" ghcr.io/ellie/atuin:latest server start
+```