contrib: Fix hash server Dockerfile dependencies

When building the Hash Equivalence server Dockerfile, some
dependencies are missing in order to run the hash server properly:

Traceback errors:

Traceback (most recent call last):
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 61, in <module>
    ret = main()
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 54, in main
    server = hashserv.create_server(args.bind, args.database, upstream=args.upstream, read_only=args.read_only)
  File "/opt/bbhashserv/lib/hashserv/__init__.py", line 120, in create_server
    from . import server
  File "/opt/bbhashserv/lib/hashserv/server.py", line 14, in <module>
    import bb.asyncrpc
ModuleNotFoundError: No module named 'bb'

Traceback (most recent call last):
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 61, in <module>
    ret = main()
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 54, in main
    server = hashserv.create_server(args.bind, args.database, upstream=args.upstream, read_only=args.read_only)
  File "/opt/bbhashserv/lib/hashserv/__init__.py", line 120, in create_server
    from . import server
  File "/opt/bbhashserv/lib/hashserv/server.py", line 14, in <module>
    import bb.asyncrpc
  File "/opt/bbhashserv/lib/bb/__init__.py", line 128, in <module>
    from bb import fetch2 as fetch
  File "/opt/bbhashserv/lib/bb/fetch2/__init__.py", line 1930, in <module>
    from . import git
  File "/opt/bbhashserv/lib/bb/fetch2/git.py", line 70, in <module>
    import bb.progress
  File "/opt/bbhashserv/lib/bb/progress.py", line 14, in <module>
    import bb.build
  File "/opt/bbhashserv/lib/bb/build.py", line 27, in <module>
    from bb import data, event, utils
  File "/opt/bbhashserv/lib/bb/data.py", line 36, in <module>
    from bb import data_smart
  File "/opt/bbhashserv/lib/bb/data_smart.py", line 23, in <module>
    import bb, bb.codeparser
  File "/opt/bbhashserv/lib/bb/codeparser.py", line 26, in <module>
    import codegen
ModuleNotFoundError: No module named 'codegen'

Traceback (most recent call last):
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 61, in <module>
    ret = main()
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 54, in main
    server = hashserv.create_server(args.bind, args.database, upstream=args.upstream, read_only=args.read_only)
  File "/opt/bbhashserv/lib/hashserv/__init__.py", line 120, in create_server
    from . import server
  File "/opt/bbhashserv/lib/hashserv/server.py", line 14, in <module>
    import bb.asyncrpc
  File "/opt/bbhashserv/lib/bb/__init__.py", line 128, in <module>
    from bb import fetch2 as fetch
  File "/opt/bbhashserv/lib/bb/fetch2/__init__.py", line 1930, in <module>
    from . import git
  File "/opt/bbhashserv/lib/bb/fetch2/git.py", line 70, in <module>
    import bb.progress
  File "/opt/bbhashserv/lib/bb/progress.py", line 14, in <module>
    import bb.build
  File "/opt/bbhashserv/lib/bb/build.py", line 27, in <module>
    from bb import data, event, utils
  File "/opt/bbhashserv/lib/bb/data.py", line 36, in <module>
    from bb import data_smart
  File "/opt/bbhashserv/lib/bb/data_smart.py", line 23, in <module>
    import bb, bb.codeparser
  File "/opt/bbhashserv/lib/bb/codeparser.py", line 32, in <module>
    from bb.pysh import pyshyacc, pyshlex
  File "/opt/bbhashserv/lib/bb/pysh/pyshyacc.py", line 13, in <module>
    import bb.pysh.pyshlex as pyshlex
  File "/opt/bbhashserv/lib/bb/pysh/pyshlex.py", line 17, in <module>
    from ply import lex
ModuleNotFoundError: No module named 'ply'

Traceback (most recent call last):
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 61, in <module>
    ret = main()
  File "/opt/bbhashserv/bin/bitbake-hashserv", line 54, in main
    server = hashserv.create_server(args.bind, args.database, upstream=args.upstream, read_only=args.read_only)
  File "/opt/bbhashserv/lib/hashserv/__init__.py", line 120, in create_server
    from . import server
  File "/opt/bbhashserv/lib/hashserv/server.py", line 14, in <module>
    import bb.asyncrpc
  File "/opt/bbhashserv/lib/bb/__init__.py", line 128, in <module>
    from bb import fetch2 as fetch
  File "/opt/bbhashserv/lib/bb/fetch2/__init__.py", line 1935, in <module>
    from . import wget
  File "/opt/bbhashserv/lib/bb/fetch2/wget.py", line 30, in <module>
    from   bs4 import BeautifulSoup
ModuleNotFoundError: No module named 'bs4'
---
 contrib/hashserv/Dockerfile | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)