Update to Alpine 3.10 as newer JDK 7 is required on Linux x64 for RocksJava tests to pass

Author: adamretter

README.md

@@ -60,10 +60,10 @@ $ cd centos7_s390x
 $ docker build --rm --force-rm --squash -t evolvedbinary/rocksjava:centos7_s390x-be .
 ```
 
-# Alpine 3.8 Docker Images
+# Alpine 3.10 Docker Images
 **NOTE**: Alpine uses *muslc* instead of *glibc*, and so RocksDB builds on Alpine will only run on systems with muslc.
 
-To build the Alpine 3.8 Docker images locally:
+To build the Alpine 3.10 Docker images locally:
 
 ```bash
 $ git clone https://github.com/evolvedbinary/docker-rocksjava

alpine3_arm64v8/Dockerfile

@@ -1,4 +1,4 @@
-FROM arm64v8/alpine:3.9
+FROM arm64v8/alpine:3.10
 
 # update Alpine with latest versions
 RUN echo '@edge http://nl.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \

alpine3_ppc64le/Dockerfile

@@ -1,4 +1,4 @@
-FROM ppc64le/alpine:3.9
+FROM ppc64le/alpine:3.10
 
 # update Alpine with latest versions
 RUN echo '@edge http://nl.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \

alpine3_s390x/Dockerfile

@@ -1,4 +1,4 @@
-FROM s390x/alpine:3.9
+FROM s390x/alpine:3.10
 
 # update Alpine with latest versions
 RUN echo '@edge http://nl.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \

alpine3_x64/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.9
+FROM alpine:3.10
 
 # update Alpine with latest versions
 RUN echo '@edge http://nl.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \

alpine3_x86/Dockerfile

@@ -1,4 +1,4 @@
-FROM i386/alpine:3.9
+FROM i386/alpine:3.10
 
 # update Alpine with latest versions
 RUN echo '@edge http://nl.alpinelinux.org/alpine/edge/main' >> /etc/apk/repositories \