Update Dockerfile and workflows

Signed-off-by: Nicko Guyer <nicko.guyer@kaleido.io>

.github/workflows/docker_main.yml

@@ -9,7 +9,7 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - name: Set build tag
         id: build_tag_generator

.github/workflows/docker_release.yml

@@ -8,7 +8,7 @@ jobs:
   docker:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
 

.github/workflows/go.yaml

@@ -11,18 +11,18 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-        with:
+      - uses: actions/checkout@v4
+        with
           path: 'ethconnect'
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           repository: kaleido-io/ethbinding
           path: 'ethbinding'
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
-          go-version: 1.19
+          go-version: "1.21"
 
       - name: Install solc
         run: |

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.19-buster AS builder
+FROM golang:1.21-buster AS builder
 WORKDIR /ethconnect
 RUN apt-get update -y \
  && apt-get install -y build-essential git \