add CI

.github/workflows/main.yml

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+name: build
+
+on:
+  push:
+    branches:
+      - master
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps: 
+      - name: Set up Docker Buildx 
+        uses: docker/setup-buildx-action@v1
+
+      -
+        name: Login to ghcr.io
+        uses: docker/login-action@v1
+        with: 
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Build container and push to ghcr.io
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: ghcr.io/iofq/nvim:latest
+      -
+        name: Extract .tar.gz from container
+        uses: shrink/actions-docker-extract@v1
+        id: extract
+        with:
+          image: ghcr.io/iofq/nvim:latest
+          path: /root/term.tgz
+      -
+        name: Upload archive to release
+        uses: xresloader/upload-to-github-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          file: ${{ steps.extract.outputs.destination }}
+          update_latest_release: true
+          overwrite: true

Dockerfile

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+FROM nixos/nix
+
+ADD .
+
+RUN nix bundle --bundler github:ralismark/nix-appimage .
+
+ENTRYPOINT [ "nvim-x86_64.AppImage" ]

nvim-x86_64.AppImage

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+/nix/store/3dyh4jbvp9rj0wdyxapf514fz4s76xpl-nvim-x86_64.AppImage