add readme instructions for docker image builds

update tomcat on jdk8 image

Author: prasad-1210

Dockerfile-Readme.md

@@ -0,0 +1,35 @@
+# Jre11-Tomcat9 build
+
+####Get version of jdk
+https://pkgs.alpinelinux.org/package/edge/community/x86_64/openjdk11
+
+Run Alpine container
+
+jre11
+```docker run -ti --rm alpine sh
+apk add openjdk11
+java -version
+```
+
+jre8
+```docker run -ti --rm alpine sh
+apk add openjdk8-jre
+java -version
+```
+copy Build version number into ENV JAVA_VERSION=<<????>>
+
+
+
+### Get Tomcat9 version
+https://tomcat.apache.org/tomcat-9.0-doc/changelog.html
+copy latest version number from page above to ENV TOMCAT_VERSION <<<???>>>
+
+### Image tag
+prasad1210/tomcat-custom:<<TOMCAT_VERSION>>.<<BUILD_NUMBER>>-alpine-jre-<JRE_VERSION_3_decimals>
+prasad1210/tomcat-custom:9.0.41.0-alpine-jre-11.0.09
+
+### doker build command
+```
+docker build -t prasad1210/tomcat-custom:9.0.41.0-alpine-jre-11.0.09 . -f Dockerfile-tomcat-jre --no-cache
+docker push prasad1210/tomcat-custom:9.0.41.0-alpine-jre-11.0.09
+```

Dockerfile-tomcat-jre

@@ -13,22 +13,23 @@ MAINTAINER "Prasad CH <[email protected]>"
 ENV OS_RELEASE="Alpine Linux v3.12"
 
 # Installed main dependencies:
-#  ca-certificates-bundle-20191127-r2 x86_64: for certificate management to support SSL
+#  ca-certificates-bundle-20191127-r4 x86_64: for certificate management to support SSL
 #  openjdk11: OpenJDK built by Simon Frankenberger <[email protected]> from https://hg.openjdk.java.net/jdk-updates/jdk11u
 #                               https://git.alpinelinux.org/aports/commit/?id=b85efc501595136485aea134946fa459bff115b0
-#  fontconfig-2.13.1-r2 x86_64 : For supporting UI/ Fonts for reporting purposes
-#  freetype-2.10.4-r0 x86_64: To support freetype fonts
+#  freetype-2.10.4-r0 x86_64 : For supporting UI/ Fonts for reporting purposes
+#  fontconfig-2.13.1-r2 x86_64: To support freetype fonts
 #  Tomcat: Java Runtime Container
 
 # https://adoptopenjdk.net/installation.html#x64_linux-jre
 # Set JRE_HOME not JAVA_HOME as we don't intend to run tomcat in debug mode
 ENV JRE_HOME=/usr/lib/jvm/default-jvm/jre
 COPY --from=stage-0 /usr/lib/jvm/default-jvm/jre/bin/jre ${JRE_HOME}
 ENV PATH=${JRE_HOME}/bin:$PATH
-ENV JAVA_VERSION=11.0.9+11-alpine-r1
+ENV JAVA_VERSION=11.0.9+11-alpine-r0
 
 RUN set -eux;\
     apk update \
+    && apk upgrade \
     # Now Add Support for cacerts
     # https://hackernoon.com/alpine-docker-image-with-secured-communication-ssl-tls-go-restful-api-128eb6b54f1f
     && apk add --no-cache ca-certificates\

Dockerfile-tomcat-jre-8

@@ -1,4 +1,4 @@
-# docker build -t prasad1210/tomcat-custom:9.0.40.0-alpine-jre-1.8.0-272-10-r2 . -f Dockerfile-tomcat-jre-8 --no-cache
+# docker build -t prasad1210/tomcat-custom:9.0.41.0-alpine-jre-1.8.0-272-10-r4 . -f Dockerfile-tomcat-jre-8 --no-cache
 FROM alpine:latest
 MAINTAINER "Prasad CH <[email protected]>"
 ENV OS_RELEASE="Alpine Linux v3.12"
@@ -16,10 +16,11 @@ ENV OS_RELEASE="Alpine Linux v3.12"
 ENV JRE_HOME=/usr/lib/jvm/default-jvm/jre
 RUN apk --no-cache --virtual add openjdk8-jre --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community
 ENV PATH=${JRE_HOME}/bin:$PATH
-ENV JAVA_VERSION=1.8.0_272.10-r2
+ENV JAVA_VERSION=1.8.0_272-b10
 
 RUN set -eux;\
     apk update \
+    && apk upgrade \
     # Now Add Support for cacerts
     # https://hackernoon.com/alpine-docker-image-with-secured-communication-ssl-tls-go-restful-api-128eb6b54f1f
     && apk add --no-cache ca-certificates\
@@ -58,7 +59,7 @@ ENV LD_LIBRARY_PATH ${LD_LIBRARY_PATH:+$LD_LIBRARY_PATH:}$TOMCAT_NATIVE_LIBDIR
 ENV GPG_KEYS 05AB33110949707C93A279E3D3EFE6B686867BA6 07E48665A34DCAFAE522E5E6266191C37C037D42 47309207D818FFD8DCD3F83F1931D684307A10A5 541FBE7D8F78B25E055DDEE13C370389288584E7 61B832AC2F1C5A90F0F9B00A1C506407564C17A3 79F7026C690BAA50B92CD8B66A3AD3F4F22C4FED 9BA44C2621385CB966EBA586F72C284D731FABEE A27677289986DB50844682F8ACB77FC2E86E29AC A9C5DF4D22E99998D9875A5110C01C5A2F6059E7 DCFD35E0BF8CA7344752DE8B6FB21E8933C60243 F3A04C595DB5B6A5F1ECA43E3B7BBB100D811BBE F7DA48BB64BCB84ECBA7EE6935CD23C10D498E23
 
 ENV TOMCAT_MAJOR 9
-ENV TOMCAT_VERSION 9.0.40
+ENV TOMCAT_VERSION 9.0.41
 ENV TOMCAT_DOWNLOAD_URL https://downloads.apache.org/tomcat/tomcat-${TOMCAT_MAJOR}/v${TOMCAT_VERSION}/bin/apache-tomcat-${TOMCAT_VERSION}.tar.gz
 ENV TOMCAT_SHA512_URL https://downloads.apache.org/tomcat/tomcat-${TOMCAT_MAJOR}/v${TOMCAT_VERSION}/bin/apache-tomcat-${TOMCAT_VERSION}.tar.gz.sha512
 # https://downloads.apache.org/tomcat/tomcat-${TOMCAT_MAJOR}/v${TOMCAT_VERSION}/bin/apache-tomcat-${TOMCAT_VERSION}.tar.gz.sha512