diff --git a/Dockerfile b/Dockerfile
index e9767402c74..8cb88ae83e4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,5 @@
-
-###################################
-#Build stage - temporarily using techknowlogick image until we upgrade to latest official alpine/go image
-FROM techknowlogick/go:1.17-alpine3.13 AS build-env
+#Build stage
+FROM golang:1.17-alpine3.15 AS build-env
 
 ARG GOPROXY
 ENV GOPROXY ${GOPROXY:-direct}
@@ -25,7 +23,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.13
+FROM alpine:3.15
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 22 3000
diff --git a/Dockerfile.rootless b/Dockerfile.rootless
index 5b22b26bc22..78a6c3cb038 100644
--- a/Dockerfile.rootless
+++ b/Dockerfile.rootless
@@ -1,7 +1,5 @@
-
-###################################
-#Build stage - temporarily using techknowlogick image until we upgrade to latest official alpine/go image
-FROM techknowlogick/go:1.17-alpine3.13 AS build-env
+#Build stage
+FROM golang:1.17-alpine3.15 AS build-env
 
 ARG GOPROXY
 ENV GOPROXY ${GOPROXY:-direct}
@@ -25,7 +23,7 @@ RUN if [ -n "${GITEA_VERSION}" ]; then git checkout "${GITEA_VERSION}"; fi \
 # Begin env-to-ini build
 RUN go build contrib/environment-to-ini/environment-to-ini.go
 
-FROM alpine:3.13
+FROM alpine:3.15
 LABEL maintainer="maintainers@gitea.io"
 
 EXPOSE 2222 3000
diff --git a/docker/root/usr/bin/entrypoint b/docker/root/usr/bin/entrypoint
index a3c03ecff37..0acfec4dbe4 100755
--- a/docker/root/usr/bin/entrypoint
+++ b/docker/root/usr/bin/entrypoint
@@ -1,5 +1,11 @@
 #!/bin/sh
 
+# Protect against buggy runc in docker <20.10.6 causing problems in with Alpine >= 3.14
+if [ ! -x /bin/sh ]; then
+  echo "Executable test for /bin/sh failed. Your Docker version is too old to run Alpine 3.14+ and Gitea. You must upgrade Docker.";
+  exit 1;
+fi
+
 if [ "${USER}" != "git" ]; then
     # rename user
     sed -i -e "s/^git\:/${USER}\:/g" /etc/passwd
diff --git a/docker/rootless/usr/local/bin/docker-entrypoint.sh b/docker/rootless/usr/local/bin/docker-entrypoint.sh
index d05777adc56..ca509214bff 100755
--- a/docker/rootless/usr/local/bin/docker-entrypoint.sh
+++ b/docker/rootless/usr/local/bin/docker-entrypoint.sh
@@ -1,5 +1,11 @@
 #!/bin/sh
 
+# Protect against buggy runc in docker <20.10.6 causing problems in with Alpine >= 3.14
+if [ ! -x /bin/sh ]; then
+  echo "Executable test for /bin/sh failed. Your Docker version is too old to run Alpine 3.14+ and Gitea. You must upgrade Docker.";
+  exit 1;
+fi
+
 if [ -x /usr/local/bin/docker-setup.sh ]; then
     /usr/local/bin/docker-setup.sh || { echo 'docker setup failed' ; exit 1; }
 fi