Dockerfile should ensure directories are writable by root group (gid=0)

[tbieste]

Describe the bug
The docker files for ibm-fhir-server and ibm-fhir-schema-tool should ensure any directories that need to be written to are writable by root group (gid=0), to allow the container to be run as any UID that has a GID=0.

Environment
IBM FHIR Server 4.8.3

To Reproduce
Steps to reproduce the behavior:

1. Run container as UID that is not root or UID 1001, but does have GID=0.
2. Current error from schema-tool container:
   /opt/schematool/run.sh: line 104: /opt/schematool/workarea/persistence.json: Permission denied
3. Current error from fhir-server container:
   cp: cannot create regular file '/config/configDropins/overrides/myfile.xml': Permission denied

Expected behavior
Should not get permission denied errors.

[tbieste]

During QA, tried this out and now get a different permission denied error:

run.sh - [INFO]: 2021-07-28_15:45:55 - creating the schema

• /opt/java/openjdk/bin/java -jar /opt/schematool/fhir-persistence-schema-4.9.0-SNAPSHOT-cli.jar ...
• tee out.log
  tee: out.log: Permission denied
  Jul 28, 2021 3:45:57 PM com.ibm.fhir.schema.app.Main main
  SEVERE: schema tool failed
  java.lang.IllegalStateException: Error while initializing log output file.
  at com.ibm.fhir.database.utils.common.LogFormatter.init(LogFormatter.java:92)
  at com.ibm.fhir.schema.app.util.CommonUtil.configureLogger(CommonUtil.java:185)
  at com.ibm.fhir.schema.app.util.CommonUtil.configureLogger(CommonUtil.java:157)
  at com.ibm.fhir.schema.app.Main.main(Main.java:2193)
  Caused by: java.nio.file.AccessDeniedException: ./fhirschema.log.lck
  at java.base/sun.nio.fs.UnixException.translateToIOException(Unknown Source)
  at java.base/sun.nio.fs.UnixException.rethrowAsIOException(Unknown Source)
  at java.base/sun.nio.fs.UnixException.rethrowAsIOException(Unknown Source)
  at java.base/sun.nio.fs.UnixFileSystemProvider.newFileChannel(Unknown Source)
  at java.base/java.nio.channels.FileChannel.open(Unknown Source)
  at java.base/java.nio.channels.FileChannel.open(Unknown Source)
  at java.logging/java.util.logging.FileHandler.openFiles(Unknown Source)
  at java.logging/java.util.logging.FileHandler.(Unknown Source)
  at com.ibm.fhir.database.utils.common.LogFormatter.init(LogFormatter.java:88)
  ... 3 more

Jul 28, 2021 3:45:57 PM com.ibm.fhir.schema.app.Main logStatusMessage
SEVERE: SCHEMA CHANGE: RUNTIME ERROR

[tbieste]

I tried this out again with the updated PR, and did not get the errors. Marking as closed.