ci: fix container build

Follow-up to #14,
in which I overlooked the tarball reference in the containerfile.
The container build was failing, which meant the auto-deploys weren't
working, which is how I noticed.

.dockerignore

@@ -11,6 +11,3 @@
 !backend/
 !app/
 !public/
-
-# allow a specific source tarball, introduced in GH#13.
-!penumbra-zone-ui-tailwind-0.1.0.tgz

Containerfile

@@ -11,7 +11,7 @@ RUN apk add --no-cache libc6-compat
 WORKDIR /app
 
 # Install dependencies
-COPY package.json pnpm-lock.yaml* penumbra-zone-ui-tailwind-0.1.0.tgz ./
+COPY package.json pnpm-lock.yaml* .
 RUN pnpm install --frozen-lockfile
 
 # Rebuild the source code only when needed