Update Docker tags Ubuntu bionic

Author: Andrea-Scuderi

Makefile

@@ -1,12 +1,11 @@
-
 # Use this tag to build a customized local image
 
 SWIFT_VERSION?=nightly-amazonlinux2
 LAYER_VERSION?=nightly-amazonlinux2
 DOCKER_OS?=amazonlinux2
-# SWIFT_VERSION=5.2.3
-# LAYER_VERSION=5-2-3
-# DOCKER_OS=xenial
+# SWIFT_VERSION=5.2.3-bionic
+# LAYER_VERSION=5-2-3-bionic
+# DOCKER_OS=bionic
 DOCKER_TAG=nio-swift:$(SWIFT_VERSION)
 SWIFT_DOCKER_IMAGE=$(DOCKER_TAG)
 SWIFT_LAMBDA_LIBRARY=nio-swift-lambda-runtime-$(LAYER_VERSION)

docker/5.0.3/Dockerfile renamed to docker/5.0.3-bionic/Dockerfile

@@ -1,4 +1,4 @@
-FROM swift:5.0.3 as builder
+FROM swift:5.0.3-bionic as builder
 
 RUN apt-get -qq update && apt-get -q -y install \
     libssl-dev libicu-dev

docker/5.0.3/bootstrap renamed to docker/5.0.3-bionic/bootstrap

@@ -1,4 +1,4 @@
-FROM swift:5.1.5 as builder
+FROM swift:5.1.5-bionic as builder
 
 RUN apt-get -qq update && apt-get -q -y install \
     libssl-dev libicu-dev

docker/5.0.3/swift-shared-libraries.txt renamed to docker/5.0.3-bionic/swift-shared-libraries.txt

@@ -1,4 +1,4 @@
-FROM swift:5.2.3 as builder
+FROM swift:5.2.3-bionic as builder
 
 RUN apt-get -qq update && apt-get -q -y install \
     libssl-dev libicu-dev