Dockerfile: Build and run ORT with Java 17 LTS

Build ORT with Java 17 LTS to benefit from newer bytecode optimizations
[1] and to get rid of the bogus "illegal reflective access" warning
triggered by Retrofit which caused a lot of confusion [2].

While "Alpine is not in a supported release by OpenJDK" [3],
eclipse-temurin [4] (which supersedes the deprecated adoptopenjdk [5])
does offers both JRE and JDK Alpine images [6]. However, use neither of
them and instead prefer to use the slightly larger "17-jdk-focal" image
instead as that JDK image can also be easily used to *run* ORT in order
to supersede #4178, so building and running ORT share the same image.

At a later point, the effort to use "eclipse-temurin:17-jdk-alpine" for
running (and building) ORT could be undertaken in order to reduce the
Docker image size (see #3230). But installing all required tools and
building ScanCode on Alpine could become difficult.

[1]: #4912
[2]: https://github.com/oss-review-toolkit/ort/search?q=%22illegal+reflective+access%22&type=issues
[3]: https://hub.docker.com/_/openjdk
[4]: https://hub.docker.com/_/eclipse-temurin
[5]: https://hub.docker.com/_/adoptopenjdk
[6]: https://blog.adoptium.net/2021/09/eclipse-temurin-17-available/

Signed-off-by: Sebastian Schuberth <sebastian.schuberth@bosch.io>

Dockerfile

@@ -28,16 +28,7 @@ ARG CRT_FILES=""
 # Set this to the ScanCode version to use.
 ARG SCANCODE_VERSION="30.1.0"
 
-FROM adoptopenjdk/openjdk11:alpine-slim AS build
-
-# Apk install commands.
-RUN apk add --no-cache \
-        # Required for Node.js to build the reporter-web-app.
-        libstdc++ \
-        # Required to allow to download via a proxy with a self-signed certificate.
-        ca-certificates \
-        coreutils \
-        openssl
+FROM eclipse-temurin:17-jdk-focal AS build
 
 COPY . /usr/local/src/ort
 
@@ -53,7 +44,7 @@ RUN --mount=type=cache,target=/tmp/.gradle/ \
     sed -i -r '/distributionSha256Sum=[0-9a-f]{64}/d' gradle/wrapper/gradle-wrapper.properties && \
     ./gradlew --no-daemon --stacktrace -Pversion=$ORT_VERSION :cli:distTar :helper-cli:startScripts
 
-FROM adoptopenjdk:11-jre-hotspot-focal
+FROM eclipse-temurin:17-jdk-focal
 
 ENV \
     # Package manager versions.