udpate docker setup (#4188)

motivation: keep docker setup up to date

changes:
* add docker setup for 5.6 (nightly)
* udpate swiftpm system dependencies to include runtime dependencies (needed for tests)
* update volume mounts to include the dependencies on swift-system and swift-collections (needed by bootstrap)

Author: tomerd

Utilities/Docker/Dockerfile

@@ -24,9 +24,11 @@ ENV LANGUAGE en_US.UTF-8
 #---------------------
 
 RUN apt-get update && apt-get install -y \
-  sqlite3 \
+  git \
   libsqlite3-dev \
-  libncurses5-dev
+  libncurses5-dev \
+  sqlite3 \
+  zip
 
 # Bootstrap script dependencies
 #------------------------------

Utilities/Docker/docker-compose.2004.56.yaml

@@ -0,0 +1,37 @@
+# This source file is part of the Swift.org open source project
+#
+# Copyright (c) 2021 Apple Inc. and the Swift project authors
+# Licensed under Apache License v2.0 with Runtime Library Exception
+#
+# See http://swift.org/LICENSE.txt for license information
+# See http://swift.org/CONTRIBUTORS.txt for Swift project authors
+
+version: "3"
+
+services:
+
+  runtime-setup:
+    image: swift-package-manager:20.04-5.6
+    build:
+      args:
+        ubuntu_version: "focal"
+        swift_version: "5.6"
+        base_image: "swiftlang/swift:nightly-5.6-focal"
+
+  build:
+    image: swift-package-manager:20.04-5.6
+
+  test:
+    image: swift-package-manager:20.04-5.6
+
+  bootstrap-clean:
+    image: swift-package-manager:20.04-5.6
+
+  bootstrap-build:
+    image: swift-package-manager:20.04-5.6
+
+  bootstrap-test:
+    image: swift-package-manager:20.04-5.6
+
+  shell:
+    image: swift-package-manager:20.04-5.6

Utilities/Docker/docker-compose.yaml

@@ -39,6 +39,8 @@ services:
       - ../../../swift-driver:/code/swift-driver:z
       - ../../../swift-crypto:/code/swift-crypto:z
       - ../../../swift-llbuild:/code/llbuild:z
+      - ../../../swift-system:/code/swift-system:z
+      - ../../../swift-collections:/code/swift-collections:z
     working_dir: /code/swift-package-manager
     cap_drop:
       - CAP_NET_RAW