Use swift:5.6-focal docker images (#7245)

frameworks/Swift/hummingbird-core/hummingbird-core.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/hummingbird/hummingbird-postgres.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/hummingbird/hummingbird.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/swift-nio/swift-nio.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Install Swift dependencies

frameworks/Swift/vapor/vapor-fluent.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/vapor/vapor-mongo-fluent.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/vapor/vapor-mongo.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -18,7 +18,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 RUN apt update

frameworks/Swift/vapor/vapor-postgres.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/vapor/vapor-sql-kit.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts

frameworks/Swift/vapor/vapor.dockerfile

@@ -1,7 +1,7 @@
 # ================================
 # Build image
 # ================================
-FROM swift:5.5 as build
+FROM swift:5.6-focal as build
 WORKDIR /build
 
 # Copy entire repo into container
@@ -15,7 +15,7 @@ RUN swift build \
 # ================================
 # Run image
 # ================================
-FROM swift:5.5-slim
+FROM swift:5.6-focal-slim
 WORKDIR /run
 
 # Copy build artifacts