Update the ARM Makefiles for Alertmanager

Signed-off-by: Radoslav Dimitrov <dimitrovr@vmware.com>

contrib/alertmanager-arm64/0.15.0/Makefile

@@ -0,0 +1,7 @@
+.PHONY: ci-arm64-build
+ci-arm64-build:
+	docker build -t functions/alertmanager:0.15.0-arm64 .
+
+.PHONY: ci-arm64-push
+ci-arm64-push:
+	docker push functions/alertmanager:0.15.0-arm64

contrib/alertmanager-arm64/0.15.0/README.md

@@ -0,0 +1,13 @@
+# Alertmanager for ARM64
+
+## Building:
+
+```bash
+make ci-arm64-build
+```
+
+## Pushing:
+
+```bash
+make ci-arm64-push
+```

contrib/alertmanager-arm64/v0.15.0/Makefile

@@ -1,2 +0,0 @@
-build:
-	docker build -t functions/alertmanager:v0.15.0-arm64 .

contrib/alertmanager-arm64/v0.15.0/README.md

@@ -1,6 +0,0 @@
-Building:
-
-```bash
-docker build -t functions/alertmanager:0.15.0-rc.0-arm64 .
-docker push functions/alertmanager:0.15.0-rc.0-arm64
-```

contrib/alertmanager-armhf/0.15.0/Makefile

@@ -1,3 +1,7 @@
-build:
+.PHONY: ci-armhf-build
-	docker build -t alexellis2/alertmanager:v0.15.0-armv7 .
+ci-armhf-build:
+	docker build -t functions/alertmanager:0.15.0-armhf .
 
+.PHONY: ci-armhf-push
+ci-armhf-push:
+	docker push functions/alertmanager:0.15.0-armhf

contrib/alertmanager-armhf/0.15.0/README.md

@@ -0,0 +1,13 @@
+# Alertmanager for ARMHF
+
+## Building:
+
+```bash
+make ci-armhf-build
+```
+
+## Pushing:
+
+```bash
+make ci-armhf-push
+```