Base gitea on busybox glibc image

Build gitea from busybox glibc image.
It gets a little smaller (230M instead of 270M).
Added bash, gitea warns if not found.

Dockerfile.base.busybox

@@ -0,0 +1,12 @@
+# syntax=docker/dockerfile:1
+# gentoo-base-busybox
+FROM docker.io/gentoo/stage3:nomultilib AS builder
+
+WORKDIR /workdir
+COPY --exclude=repos . .
+COPY repos /var/db/repos
+RUN echo 'FEATURES="-ipc-sandbox -network-sandbox -pid-sandbox"' >> /etc/portage/make.conf
+RUN --mount=type=cache,target=/workdir/cache,sharing=locked \
+	    /bin/bash src/bootstrap.sh -u -r /var/db/repos/ceamac -p ceamac:linux/arch/amd64/busybox -m make-docker.conf /mnt/gentoo -j12
+
+CMD ["/bin/sh"]

Dockerfile.busybox.gitea

@@ -0,0 +1,20 @@
+# syntax=docker/dockerfile:1
+# gentoo-gitea
+FROM gentoo-base-busybox AS builder
+
+WORKDIR /workdir
+COPY --exclude=repos --exclude=bin . .
+RUN --mount=type=cache,target=/workdir/cache,sharing=locked <<-EOF
+	echo 'acct-user/git gitea -git' >> /etc/portage/package.use/gitea
+	emerge -1v --quiet-build=y acct-user/git
+	/bin/bash src/setup-gitea.sh /mnt/gentoo -j8
+EOF
+
+FROM scratch
+WORKDIR /
+EXPOSE 3000 32799
+VOLUME ["/etc/gitea", "/var/lib/gitea"]
+COPY --from=builder /mnt/gentoo /
+RUN rm -fR /var/db
+USER git:git
+CMD ["/usr/bin/gitea", "web"]

src/setup-gitea.sh

@@ -8,7 +8,7 @@ imagename="$(basename "${imagedir}")"
 shift
 
 usename="${imagedir}"/etc/portage/package.use
-[[ -d ${usename} ]] && usename="${usename}"/php.conf
+[[ -d ${usename} ]] && usename="${usename}"/gitea.conf
 
 cat <<-EOF >> "${usename}"
 */*			cxx
@@ -21,7 +21,7 @@ dev-vcs/git		-perl
 sys-apps/shadow		su
 EOF
 
-bin/"${imagename}"-emerge -vk "$@" gitea dev-vcs/git-lfs
+bin/"${imagename}"-emerge -vk "$@" www-apps/gitea dev-vcs/git-lfs app-shells/bash
 bin/"${imagename}"-emerge -1vuDUk "$@" @world
 bin/"${imagename}"-emerge -1c --with-bdeps=n "$@"