chore: add back build/Dockerfile for release (#3220)

Signed-off-by: Mark Phelps <209477+markphelps@users.noreply.github.com>

.goreleaser.yml

@@ -1,4 +1,5 @@
 # yaml-language-server: $schema=https://goreleaser.com/static/schema-pro.json
+version: 2
 
 project_name: flipt
 

build/Dockerfile

@@ -0,0 +1,30 @@
+# https://goreleaser.com/docker/
+
+ARG BINARY=flipt
+
+FROM alpine:3.20.0
+
+LABEL maintainer="dev@flipt.io"
+LABEL org.opencontainers.image.name="flipt"
+LABEL org.opencontainers.image.source="https://github.com/flipt-io/flipt"
+
+RUN apk add --no-cache postgresql-client \
+    openssl \
+    ca-certificates
+
+RUN mkdir -p /etc/flipt && \
+    mkdir -p /var/opt/flipt
+
+COPY $BINARY /
+COPY config/*.yml /etc/flipt/config/
+
+RUN addgroup flipt && \
+    adduser -S -D -g '' -G flipt -s /bin/sh flipt && \
+    chown -R flipt:flipt /etc/flipt /var/opt/flipt
+
+EXPOSE 8080
+EXPOSE 9000
+
+USER flipt
+
+CMD ["./flipt"]