Cease supporting Docker deployments altogether

Other changes:
* Do not use Funkwhale's CI, GitPod, etc
* Support Taskfile.yml (might make future CI builds easier)

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

front/Taskfile.yml

@@ -0,0 +1,35 @@
+# https://taskfile.dev
+
+version: '3'
+
+vars:
+  TASK_LIST: task -l
+
+tasks:
+  default:
+    cmds:
+      - echo "See a list of the available tasks with {{.TASK_LIST}}"
+    silent: true
+  install:
+    desc: Install required dependencies
+    cmds:
+      - yarn install
+  build:
+    desc: Build the frontend
+    cmds:
+      - task: install
+      - yarn build:deployment
+    env:
+      NODE_ENV: production
+  build-dev:
+    desc: Build the frontend (for developer usage)
+    cmds:
+      - task: install
+      - yarn build
+    env:
+      NODE_ENV: development
+  serve:
+    desc: Run a staging server (for developer usage)
+    cmds:
+      - task: install
+      - yarn serve