Use JDK 11 both for building and the final image in the Dockerfile

Author: fwcd

Dockerfile

@@ -1,13 +1,13 @@
 # Running this container will start a language server that listens for TCP connections on port 2088
 # Every connection will be run in a forked child process
 
-FROM alpine:3.10 AS builder
+FROM openjdk:11 AS builder
 
 WORKDIR /kotlin-language-server
 COPY . .
 RUN ./gradlew :server:installDist
 
-FROM openjdk:10
+FROM openjdk:11
 
 WORKDIR /
 COPY --from=builder /kotlin-language-server/server/build/install/server .