dockerfile: switch to chainguard image to reduce CVEs

[tuananh]

switch from debian:buster-slim to Chainguard's glibc-dynamic image as base to reduce CVEs.

Below are result when scan with trivy.

before:

larrabee/s3sync (debian 10.5)

Total: 216 (UNKNOWN: 5, LOW: 93, MEDIUM: 36, HIGH: 63, CRITICAL: 19)

after:

2023-07-03T02:54:46.447Z        INFO    Vulnerability scanning is enabled
2023-07-03T02:54:46.447Z        INFO    Secret scanning is enabled
2023-07-03T02:54:46.447Z        INFO    If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2023-07-03T02:54:46.447Z        INFO    Please see also https://aquasecurity.github.io/trivy/v0.39/docs/secret/scanning/#recommendation for faster secret detection
2023-07-03T02:54:46.451Z        INFO    Detected OS: wolfi
2023-07-03T02:54:46.451Z        INFO    Detecting Wolfi vulnerabilities...
2023-07-03T02:54:46.451Z        INFO    Number of language-specific files: 1
2023-07-03T02:54:46.451Z        INFO    Detecting gobinary vulnerabilities...

s3sync:test (wolfi 20230201)

Total: 0 (UNKNOWN: 0, LOW: 0, MEDIUM: 0, HIGH: 0, CRITICAL: 0)


s3sync (gobinary)

Total: 2 (UNKNOWN: 0, LOW: 1, MEDIUM: 1, HIGH: 0, CRITICAL: 0)

┌───────────────────────────┬───────────────┬──────────┬───────────────────┬───────────────┬────────────────────────────────────────────────────────────┐
│          Library          │ Vulnerability │ Severity │ Installed Version │ Fixed Version │                           Title                            │
├───────────────────────────┼───────────────┼──────────┼───────────────────┼───────────────┼────────────────────────────────────────────────────────────┤
│ github.com/aws/aws-sdk-go │ CVE-2020-8911 │ MEDIUM   │ v1.44.294         │               │ aws/aws-sdk-go: CBC padding oracle issue in AWS S3 Crypto  │
│                           │               │          │                   │               │ SDK for golang...                                          │
│                           │               │          │                   │               │ https://avd.aquasec.com/nvd/cve-2020-8911                  │
│                           ├───────────────┼──────────┤                   ├───────────────┼────────────────────────────────────────────────────────────┤
│                           │ CVE-2020-8912 │ LOW      │                   │               │ aws-sdk-go: In-band key negotiation issue in AWS S3 Crypto │
│                           │               │          │                   │               │ SDK for golang...                                          │
│                           │               │          │                   │               │ https://avd.aquasec.com/nvd/cve-2020-8912                  │