curl: Could not resolve host: fly.io

[OldhamMade]

Builds currently failing with the below:

Build container for action use: '/home/runner/work/_actions/superfly/flyctl-actions/1.1/Dockerfile'.
13  /usr/bin/docker build -t 8a33c1:8fa772ae3096462aa0a1f481e7077d79 -f "/home/runner/work/_actions/superfly/flyctl-actions/1.1/Dockerfile" "/home/runner/work/_actions/superfly/flyctl-actions/1.1"
14  Sending build context to Docker daemon  17.92kB
15  
16  Step 1/5 : FROM alpine
17  latest: Pulling from library/alpine
18  Digest: sha256:69e70a79f2d41ab5d637de98c1e0b055206ba40a8145e7bddb55ccc04e13cf8f
19  Status: Downloaded newer image for alpine:latest
20   ---> 6dbb9cc54074
21  Step 2/5 : RUN apk add --no-cache curl
22   ---> Running in e976fa63b19c
23  fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/main/x86_64/APKINDEX.tar.gz
24  fetch https://dl-cdn.alpinelinux.org/alpine/v3.13/community/x86_64/APKINDEX.tar.gz
25  (1/5) Installing ca-certificates (20191127-r5)
26  (2/5) Installing brotli-libs (1.0.9-r3)
27  (3/5) Installing nghttp2-libs (1.42.0-r1)
29  (4/5) Installing libcurl (7.76.1-r0)
18  (5/5) Installing curl (7.76.1-r0)
30  Executing busybox-1.32.1-r6.trigger
31  Executing ca-certificates-20191127-r5.trigger
32  OK: 8 MiB in 19 packages
33  Removing intermediate container e976fa63b19c
34   ---> 400b21f2b9e8
35  Step 3/5 : RUN curl -L https://fly.io/install.sh | FLYCTL_INSTALL=/usr/local sh
36   ---> Running in 66da87275922
37    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
38                                   Dload  Upload   Total   Spent    Left  Speed
39  
40    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
41    0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
42    0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
43    0     0    0     0    0     0      0      0 --:--:--  0:00:02 --:--:--     0
44    0     0    0     0    0     0      0      0 --:--:--  0:00:03 --:--:--     0
45    0     0    0     0    0     0      0      0 --:--:--  0:00:04 --:--:--     0curl: (6) Could not resolve host: fly.io
35  Removing intermediate container 66da87275922
36   ---> 68e9b2e37c8a
37  Step 4/5 : COPY entrypoint.sh /entrypoint.sh
38   ---> 8bf87cbc1e13
39  Step 5/5 : ENTRYPOINT ["/entrypoint.sh"]
40   ---> Running in b2a1f7158714
41  Removing intermediate container b2a1f7158714
42   ---> 36b3de0282e0
43  Successfully built 36b3de0282e0
44  Successfully tagged 8a33c1:8fa772ae3096462aa0a1f481e7077d79