core-installer: bootstrap logic

Installs soft-serve git server and fluxcd.
Fluxcd stores all system resource configurations on soft-serve.
diff --git a/core/installer/Dockerfile.flux b/core/installer/Dockerfile.flux
new file mode 100644
index 0000000..5982690
--- /dev/null
+++ b/core/installer/Dockerfile.flux
@@ -0,0 +1,9 @@
+FROM alpine:3.14.2 AS build
+
+WORKDIR /download
+RUN wget https://github.com/fluxcd/flux2/releases/download/v0.29.5/flux_0.29.5_linux_arm64.tar.gz
+RUN tar -zxvf flux_0.29.5_linux_arm64.tar.gz
+FROM alpine:3.14.2
+
+WORKDIR /
+COPY --from=build /download/flux ./flux