chore(deps): update docker/dockerfile docker tag to v1.7 #316

Job	Run time
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_produ...	5s
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_produ...	5s
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_debug...	10s
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_debug...	11s
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_debug...	13s
Build docker image (and publish on main) (ghcr.io/giganticminecraft/seichi_minecraft_server_debug...	11s
	55s

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