Created reactor build script for docker images and tested local registry

.dockerignore

@@ -1,8 +1,10 @@
 *
 # exluding everything and only allowing directly relevant stuff
 !cmd/server/main.go
+!cmd/reactor/main.go
 !internal
 !tokens
 !go.mod
 !go.sum
 !server
+!reactor

Dockerfile.reactor

@@ -0,0 +1,22 @@
+# syntax=docker/dockerfile:1
+FROM --platform=$BUILDPLATFORM golang:1.18-alpine as builder
+
+WORKDIR /app
+
+COPY . .
+
+RUN go mod download
+
+ARG TARGETOS TARGETARCH TARGETVARIANT
+
+RUN if [[ $TARGETVARIANT == "v7" ]]; \
+then \
+export GOARM=7; \
+fi; \ 
+CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o /reactor ./cmd/reactor/main.go
+
+FROM alpine
+
+COPY --from=builder /reactor .
+
+ENTRYPOINT [ "./reactor" ]

reactor_build.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+
+display_usage() {
+    echo "Usage: $0 reactor_type"
+}
+
+# checking for help options
+if [[ $@ == "--help" || $@ == "-h" ]]
+then
+    display_usage
+    exit 0
+fi
+
+# checking that arguements are not empty
+if [[ -z $1 ]]
+then
+    echo "Type of reactor not specified!"
+    display_usage
+    exit 1
+fi
+
+# checking for valid reactor types
+if [[ $1 == "pi" ]]
+then
+    platform="linux/arm64"
+elif [[ $1 == "bb" ]]
+then
+    platform="linux/arm/v7"
+else
+    echo "Reactor type $1 not supported!"
+    echo "Supported reactors include: pi, bb"
+    display_usage
+    exit 1
+fi
+
+# building reactor image
+
+echo "Building Reactor image for $1 platform=$platform"
+
+docker buildx build --rm --platform=$platform -f Dockerfile.reactor --tag localhost:5000/reactor .
+
+echo "Cleaning local images"
+
+docker image remove localhost:5000/reactor