Docker image: add openssh and git, fix #510
Docker image: add openssh and git, fix #510

squidfunk/mkdocs-material,supremainc/sfmdev,supremainc/sfmdev,squidfunk/mkdocs-material,squidfunk/mkdocs-material,supremainc/sfmdev,supremainc/sfmdev,squidfunk/mkdocs-material