🚧 Add VHS to Docker build

Add VHS to Docker build to enable recording the demo animation. There
is a known performance issue caused by CPU requirements exceed current
machine. This causes frames to be dropped which results in the video
playback being faster than normal.

Dockerfile

@@ -1,3 +1,5 @@
+# syntax=docker/dockerfile:1.4
+
 FROM golang:1.19.4-alpine3.17 as base
 WORKDIR /usr/src/app
 RUN --mount=type=cache,target=/var/cache/apk \
@@ -43,4 +45,34 @@ RUN git config --global user.email "[email protected]" && \
     git config --global user.name "Your Name" && \
     git init
 
-ENTRYPOINT ["committed"]
+FROM mikelorant/vhs as vhs
+
+RUN apt-get -y install git
+
+COPY --from=build /usr/local/bin/committed /usr/local/bin
+
+ENV VHS_NO_SANDBOX="true"
+ENV TERM=xterm-256color
+
+RUN git config --global user.email "[email protected]" && \
+    git config --global user.name "John Doe" && \
+    git init
+
+RUN mkdir -p /root/.config/committed
+COPY <<EOF /root/.config/committed/config.yaml
+view:
+  compatibility: ttyd
+  ignoreGlobalAuthor: true
+
+authors:
+  - name: John Doe
+    email: [email protected]
+  - name: John Doe
+    email: [email protected]
+  - name: John Doe
+    email: [email protected]
+EOF
+
+COPY scripts ./
+
+ENTRYPOINT ["bash"]

scripts/demo.tape

@@ -2,13 +2,7 @@
 # - Use ttyd 1.7.2 which resolves missing cursor.
 # - Use current build of vhs to resolve width issues.
 # - Modify high-voltage with basic version. (emoji.yaml)
-# - Copy $HOME/.config/committed/config.yaml to current directory.
-# - Modify config to use:
-#     view.compatibility = ttyd (config.yaml)
-#     authors:
-#       - name: John Doe
-#         email: [email protected]
-# - Comment out user in Git config. (~/.gitconfig)
+# - Copy scripts/demo.yaml to current directory.
 # - Build release: go build -tags release
 
 Output demo.gif

scripts/demo.yaml

@@ -0,0 +1,9 @@
+view:
+    compatibility: ttyd
+    ignoreGlobalAuthor: true
+
+authors:
+  - name: John Doe
+    email: [email protected]
+  - name: John Doe
+    email: [email protected]